Nevada air pollution stats

County	First data available	Last data available
Carson City	1997	2007
Churchill Co	1997	1998
Clark Co	1997	2007
Douglas Co	1997	2007
Elko Co	1997	2007
Lander Co	1997	2002
Mineral Co	2003	2004
Nye Co	2003	2007
Pershing Co	1997	1998
Washoe Co	1997	2007
White Pine Co	1997	2007